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` ofFig. 5 showing the way of supporting thel ywarren STATES PATENT OFFICE FRANK DUSTAN, OF WILKINSBURG, PENNSYLVANIA, AND HARRY W. CROSS, OF FITCH- BURG, MASSACHUSETTS, ASSIGNORS TO MANNING, MAXWELL & MOORE, INC., 0F NEW YORK, N. Y., A CORPORATION OF NEW `.'EXRSBZ' STRONG BACK This is a division of my application for a patent on a rotary sheet squaring machine, Serialr No. 338,872, filed February 9, 1929.

This invention relates to a machine for squaring metal sheets such as steel sheets andV packs and the like.

The principal objects of the invention are ving drawings in which Fig. l is a plan of a machine constructed in accordance with this invention;

Fig. 2 is an elevation of the mechanism for feeding in the plates and cutting them, showing either the longitudinal or side cutters;

Fig. 3 is a sectional view on the line 3-3 y of Fig. 2

' Fig. 4 is a view taken inside the feed rollsV of the trimming mechanism;

Fig. 5 isa sectional View on enlarged scale on the line 5-5 of Fig. 4; and

Fig. 6 is a sectional View on Vthe line 6-6 side cutters.-

Inthe drawings, we have shown this invention as embodied in a machine which receives the metal sheets at a certain leveland feeds them along and trims the side edges by rotary'cutters as they move.

At this end of the machine is located the mechanism for trimming the edges of the sheets or packs fed to it. For this purpose we mount a motor 30 on the base or frame of the machine and reduce the speed through a pair of gears 31 and worm reducing gearing 32 to the drive shaft 33, which extends across the machine at right angles to the line of Grignal application filed February 9, 1929, Serial No. 338,872. Divided and. this application led January serial No. 423,586.

with a spur gear 38 which meshes ywith a spur gear 39 on a parallel shaft 40. This shaft is carried in the block 36 provided with bearings 4l and held in proper position in this casing by a nut 42 on the end and a shoulder 43 on the shaft, preventing endwise motion. At the end the shaft is provided with 'a rotary cutter 44 held on it by a nut or the like and coming up against a shoulder on the slightly. Y

Two of the blocks 36 are located adjacent to the upper shaft 35 and two of them adjacent to the lower shaft 33 and fromveach of these blocks projectson the inner side a cutter 44. Thus there is a separate mounting for each individual cutter. The cutters are mounted on individual shafts and can be shaft 40 so as to be spaced from the block 36 customary. y

These cutters are arranged in pairs and are also arranged to cut by the shear method through the pack or sheet which will be supported on .the cylindrical surfaces of the lowercutters. The scrap will pass down below the upper cutters. It will be understood of course that Figs. 5 and 6 show one of the upper blocks 36 and would `represent the lower block if turned exactly the other side y The blocks 36 are mounted on twostrong backs 45 on the frameof the machine which have horizontal ways/for that purpose so' having a squared end for the application of a ifi wrench. This constitutes a strong rigid support for each cutter by itself and for the entire, series of cutters. p

The shaft 33 is also provided with a gear 53 which meshes with two side gears 5d mounted on the shafts of a pair of feed rolls 55. VThese constitute the lower feed rolls of the two pairs, the feeding-in and feedingout rolls. The upper feed rolls 56 are mounted in bearing blocks 57 which are capable of sliding up and down in ways 58 are normally forced down by strong springs 59 and the tensionadjusted by nuts. rihese upper feed rollstherefore press on the plates or packs introduced between there. The lower rolls 5,5 are geared to the upper rolls 56 by gears '62 so that the upper rolls are positively operated. Theside scrap passes :between cover plate 61 locatedbeyond the -cutters 44. The inner faces of these cover plates act as guides for the side scrap.

On account of the mounting of the cutters Hon these separate shafts and i-unning them from the main shafts 33. and 35, we avoidthe diiiiculty encountered in removing the cutters for sharpening and repairs which has been experienced heretofore. Cutters for this purpose have been placed on the driving shafts and had to be screwed thereto and when they had to be removed they had to' be slid the whole length of the shafts or nearly so and then the shafts had to be taken out-of their 'bearings in order to get vthe cutters off. Y

VThis is entirely avoided by the arrangement just described.

vAlthough we have illustrated and -described only one form of the invention, we

are aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope o-f the invention as expressed in the claims.

Therefore, we do not wish to be limited in this respect but what wedo claim is 1, In armetal sheet or pack` cutting` machine, the combination of a pair of positively driven shafts `parallel with each other,

two pairs of blocks. two pairs af parallel shaftscarriedby said blocks, a cutter carried by each 'of the last named shafts, said cutters being adapted to cooperate Vwith each other in pairs Vto shear the sheets or packs as they move through the cutters, whereby said cutters can be removed and replaced without interfering with the4 first named shafts, and means on the first shafts for driving the second set of shafts.

2. VIn a metal sheet or pack cutting machine, the combination with the frameV and an upper and llower strong back carried thereby, yofa series ofbloclrs each s-iidabiy p carried'by one ofsaid strong backs, a sha-ft 'idly in positionvand being` adjustable along the driving shafts independently of each other.

In testimony whereof we have hereunto afiXed our signatures. Y

'FRANK DUSTAN. HARRY V. CROSS.l

on each block carrying a cutter, the cutters carried by the upper and lOWerblock cooperating to shear the sheets,` a pair of driving shafts extending along said blocks and 

